Method of producing uniform pulverulent mixtures



ratented Sept. 23, 1930 UNITED STATES PATENT OFFICE HERMANN BOLLIFANN, OF HAMBURG GERMANY METHOD OF PRODUCING UNIFORM PULVERULENT MIXT G'IaLES No Drawing. Application filed Kay 21, 1929, Serial F0. 864,955, and in Germany July 5, 1928.

The present invention concerns improvements in and relating to the production of pulverulent uniform mixtures, and morepan ticularly to the production of such mixtures 7 containing both powdery materials and tough, viscous or wax-like materials.- v

Considerable difliculty is associated in mixing tough, viscous or wax-like materials such, for example, as vegetable phosphatides, with 10 pulverulent materials; sothat a power is obtained in which the phosphatide is contained uniformly distributed, and which by this addition is not as a result, conglomerated.

Until now the production ofsuch uniform inixtures was achieved in a manner suchthat the materials to be mixed were worked in a kneading machine of known construction. The desired end was in fact attained in this way, but required very much time and corresponding expenditure of power.

I have now found that a much quicker and better mixture results by operating in the following manner: e

The pulverulent ,material, for example meal, and the viscous waxy material, for ex ample vegetable lecithin are brought together in the desired proportions, for example, 85 parts of meal and 15 parts of vegetable phosphatide. Both the constituents are placed in a mixing machine and the materials are mixed for a short time. There is thereby produced a rough non-uniform mixture, in which each particle of themeal is not.

7 uniformly mixed with a uniform amount of the vegetable phosphatide, due to the tough, viscous and wax roperties of the latter, but only a slight m1x1ng of the particles of the phos hatides with the bulk of meal. v The roug' non-uniform mixture so'prepared is 40 then subjected to pressure, if desired with heating, in a suitable press. For this'step worm presses through which the mass is passed, areparticularly suited. In this way a'solid material is obtained which, without expenditure of much power, for example, in a disintegrating mill, may be reduced to the desired degree of sub-division. V

The pressing operation (accompanied by .some heating if desired) causes the waxy 4 phosphatides to become distributed or diffused substantially uniformly throughout the entire mass of the meal or other-solid material, so that by grinding this pressed material, a powder is produced, which contains the phosphatide material uniformly distributed therethrough, so that by taking out a small quantity of the material, from any part of the mass, the proportionate amount of the phosphatides are found presenttherein.

In this manner it is po'ssibleto obtain from meal, lime, cocoa and other pulverulent materials uniform phosphatide containing powders. In place of the phosphatide, other materials of the same or similar properties i *meal, and. disintegrating-the product so obtained to the requisite order of sub-division.

2. A method of producing uniform pulverulent mixtures of plant lecithin and pow- .dered solid material which does not readily' pulverulent materials react chemically with the lecithin which.

comprises sub ecting the plant lecithin and the powdered material to a rough mixing, compressing the mixture, if desired with heating, whereby the lecithin becomes distributed throughout the mass, in a substantially uniform manner and disintegrating the product so obtained to division.

3. A method of producing uniform pulverulent mixtures of plant lecithin and meal, which comprises subjecting the plant lecithin and the meal to a rough mixing, compressing the mixture, if desired with heating, whereby the lecithin becomes distributed throughout the mass, in a substantially uniform man ner and disintegrating the. product so obtamed to the requisite order of subdivision.

4. Method of producing uniform pulver ulent mixtures from waxy, viscous, tough vegetable phosphatide, and a solid material which is chemically inert with respect to such the requisite order of subphosphatide, consisting in subjecting the constituents of the mixture to a rough mixing, then compressing the mixture, if desired with heating, whereby the phosphatide becomes distributed throughout the mass of said solid material, and disintegrating the compressed product to the required degree of fineness.

In testimony whereof I afiix my signature.

' HERMANN BOLLMANN. 

